LATTICE DYNAMICS OF TRANSITION METAL OXIDE MnO USING THREE BODY FORCE SHELL MODEL

1989 ◽  
Vol 03 (02) ◽  
pp. 115-118 ◽  
Author(s):  
S. MOHAN
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Shell Model ◽  
Body Force ◽  
Phonon Dispersion ◽  
Transition Metal Oxide ◽  
Many Body ◽  
Experimental Values ◽  
Three Body ◽  
Many Body Interactions

The phonon dispersion curve for the transition metal oxide viz. manganese oxide at room temperature has been calculated for the first time, assuming Mn ++ and O −− ions are highly polarisable. The three body force shell model employed here takes care of the effect of many body interactions in the lattice potential. The aim of this paper is to treat the various interactions between the ions in a more general way without making them numerically equal. The values of the phonon frequencies evaluated by the new approach are in general, in good agreement with the experimental values.

LATTICE DYNAMICS OF MgO USING THREE-BODY FORCE SHELL MODEL

1989 ◽  
Vol 03 (10) ◽  
pp. 771-776 ◽  
Author(s):  
S. MOHAN ◽  
T. RADJAKOUMAR
Keyword(s):  
Shell Model ◽  
Lattice Dynamics ◽  
Spectroscopic Data ◽  
Body Force ◽  
Phonon Dispersion ◽  
Many Body ◽  
Body Interaction ◽  
Lattice Potential ◽  
The Many ◽  
Three Body

A modified three-body force shell model is applied to evaluate the phonon dispersion values of MgO. The many-body interaction in the lattice potential is well accounted for by this theory. The values of the phonon frequencies evaluated by this method are in good confirmation with the neutron spectroscopic data.

Quantum Many-Body Effects in Defective Transition-Metal-Oxide Superlattices

2017 ◽  
Vol 13 (11) ◽  
pp. 5604-5609 ◽  
Author(s):  
Juan A. Santana ◽  
Rohan Mishra ◽  
Jaron T. Krogel ◽  
Albina Y. Borisevich ◽  
Paul R. C. Kent ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Transition Metal Oxide ◽  
Many Body ◽  
Many Body Effects

scholarly journals LATTICE DYNAMICAL STUDY OF TITANIUM (TI) BY USING CGW-VTBFS MODEL

2021 ◽  
Vol 9 (07) ◽  
pp. 124-129
Author(s):  
U.C Srivastava ◽  
◽  
Shyamendra Pratap Singh ◽  
Keyword(s):  
Experimental Data ◽  
Specific Heat ◽  
Shell Model ◽  
Body Force ◽  
Phonon Dispersion ◽  
Dispersion Curves ◽  
Dynamical Study ◽  
Phonon Dispersion Curves ◽  
Phonon Dynamics ◽  
Experimental Values

In measurements of the phonon dynamics of bcc Titanium (Ti), In the present paper we have reported the lattice dynamical calculations which are performed by using the Clark-Gazis-Wallis (CGW) and Van der Waalsthree body force shell model (VTBFS).The theory is used to compute the phonon dispersion curves(PDC), the Specific heat variation &frequency distribution with the used temperature. The frequencies along the symmetry directions have plotted against the wavevector to obtain the phonon dispersion curves(PDC)from the present models, with the help of available experimental values. The obtained results are agreed well with experimental data.

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